Product thereof



Patented June 26, 1 934 I METHOD OF TINTING YARN AND PRODUCT THEREOFTodd Bowman Meisenheimcr, Charlotte, N. 0., assignor to CelaneseCorporation of America, a corporation of Delaware No Drawing.Application April 30, 1930, Serial No. 448,804

9 Claims.

This invention relates to the tinting of yarn for temporarily marking ofthe same, and relates more particularly to the simultaneous tinting andlubricating of yarns containing organic derivatives of cellulose.

An object of my invention is to provide a fluid for the simultaneousfugitive tinting and lubricating of textile yarns, whereby the same maybe easily identified and may be readily subjected to m textileoperations.

Further objects of my invention will appear from the following detaileddescription.

Heretofore yarns have been colored with an easily removable dye for thepurpose of identifying them as to nature, denier, twist, number offilaments, etc. during textile operations. After a finished product isproduced, the color is removed by washing or scouring. Previously,aqueous solutions of acid dyes have been used for this purpose.

iii? In the prior practice, the yarn was hanked and immersed in anaqueous solution of the fugitive dye. This practice is subject toserious defects, especially in the case of the fugitive tinting ofcellulose acetate yarn, since the yarns tend to retain a largepercentage of water. Because of the presence of this water the yarnstend to stretch under the tensions employed in winding operations, andthis excessive moisture causes the yarn to produce packages, which areeither too soft or else tend to cake. In any event the presence of thewater inthe tinting fluid tends to form textile packages which causedifiiculties when the yarn is unwound therefrom.

I have found that if a tinting material which is capable of forming asolution with an oil and which has no afinity for the yarn to be tinted,is dissolved in a vegetable, animal or mineral oil, in the presence orabsence of volatile organic liquids that aid in the formation of asolution,

ill a tinting fluid is formed that may be applied to yarn while it is intransit to a winding device, without causing the undesirable results setforth above.

in accordance with my invention, I prepare a tinting fluid whichcontains a non-drying oil and fugitive dye capable of forming a solutionwith the oil. This tinting fiuid may be applied to the yarn in anysuitable manner, but the greatest advantages of my invention areobtained by applying the tinting fluid to the yarn while it is intransit to a winding device by means of a roller or wick.

0f the non-g oils that may be used, mineral oils and nomdrying animal orvegetable oils are preferred. I have obtained very satisfactory resultswith the use of a mineral oil such as paraffin or paraflin oil. As anexample of an animal oil, Neatsfoot oil may be mentioned. Of thevegetable oils, castor oil or cotton seed oil may be used. However Ifound that the use of olive oil gives very good results.

The dyestuff that is used should be soluble in or capable of forming asolution with the oil without the aid of water. Generally it isnecessary to employ volatile organic liquids such as ethyl acetate,butyl acetate, amyl acetate, benzene, acetone, methyl or ethyl alcohol,or mixtures of two or more of these liquids, to aid the formation of thesolution of the dyestufi with the oil. The dyestuif employed should beeasily removable from the yarn to be tinted, and should be sufiicientlylight-fast so that the color thereof does not fade too rapidly onexposure to light.

The proportion of various ingredients that are used may be varied withinwide limits. Generally the solution will contain from 0.1 to 4% or moreof the dyestufi.

The tinting fluid may be applied in any suitable manner such asimmersion of the hanks in the tinting fluid. However, I prefer to applythe same to the yarn while it is run into a winding device, and in thiscase the tinting fluid may be applied by causing the yarn to pass-acrossa roller, wick or pad that is dipping or otherwise" contacting with thetinting fluid, since this method is most economical and involves the useof a very compact tinting apparatus and also avoids separate windingoperations.

The tinting fluid may be applied to the yarn while it is passing to anypackaging device for making bobbins, cones, cheeses, hanks, pirns andthe like. The tinting fluid may be applied to artificial yarns aftertheir formation but prior to their being twisted and/ or wound. Forinstance in the manufacturer of cellulose acetate yarn by the dryspinning process, a solution of cellulose acetate in an appropriatesolvent is passed through orifices of a spinneret into a heatedevaporative atmosphere, and the filaments thus formed are drawn andwound and/or twisted on to an appropriate bobbin or cap spinningmachine. When the tinting fluid made in accordance with this inventionis used in connection with the dry spinning process, the fluid isapplied to the filaments or yarns on the dry spinning machine just aftertheir exit from the casing thereof and just prior to their being twistedand/or wound.

The yarn that may be tinted in accordance with my invention may be ofany nature. However this invention is particularly applicable to thetinting of yarn made of cellulose acetate or other organic derivativesof cellulose such as cellulose formate, cellulose butyrate, cellulosepropionate, ethyl cellulose, methyl cellulose or benzyl cellulose.

In order further to illustrate my invention but without being limitedthereto, the following specific example is given.

Example To color yarn consisting wholly of cellulose acetate filamentsfor identification purposes, the following ingredients are used.

Quinizarine green base Parts by weight (N. A. C.) (Color Index No. 1078)2 Solvent assistant 10 Olive oil 190 The solvent assistant may be amixture of amyl acetate and benzene, approximately in equal proportions.The dyestuff is dissolved in the solvent assistant and the olive oil isadded thereto. Upon heating the mixture, a clear homogeneous solution isformed. Since this solution tends to become viscous when cooled, itshould be applied in a heated condition.

To apply the fugitive tint, the cellulose acetate yarn is caused to passacross a roller, the lower portion of which dips in the tinting fluidcontained in a trough. A closed steam pipe or other heating medium issubmerged in the tinting fluid to keep it warm.

The yarn so treated assumes a green color. It can be wound into packageswhich meet alltextile requirements and the yarn is well lubricated. Thefugitive tint does not rub off from the yarn and is quite fast to light.Furthermore the tint is easily removable by mere rinsing in a bathcontaining 2% of soap. The coloring matter has no afiinity for cotton orreconstituted cellulose, and when a fabric containing the tinted yarnand cotton is rinsed in a bath, no color is imparted to the cotton.

A particular important application of this invention is in the tintingof yarn that is to be used in conjunction with other yarn for theknitting of patterned fabrics.

It is to be understood that the foregoing example is given merely by wayof illustration and that many variations may be made therein withoutdeparting from the spirit of my invention.

. Having described my invention, what I desire to secure by LettersPatent is:

1. A tinting fluid for the identification of yarn comprising a solutionof a non-drying oil and Quinizarine green base.

2. A tinting fluid for the identification of yarn comprising a solutionof an olive oil and Quinizarine green base,

3. Method of tinting and conditioning yarn containing cellulose acetatecomprising applying thereto a solution of a non-drying oil andQuinizarine green base.

4. Method of tinting and conditioning yarn containing cellulose acetatecomprising applying thereto a solution of an olive oil and Quinizarinegreen base.

5. Method of tinting and conditioning yarn containing cellulose acetatecomprising applying thereto a solution comprising an olive oil andQuinizarine green base and a solvent assistant comprising a volatileorganic liquid.

6. Yarn containing cellulose acetate tinted with a fugitive tintingliquid comprising a solution of a non-drying oil and a Quinizarine greenbase.

7. Method of tinting and conditioning yarn comprising applying thereto atinting fluid comprising a solution of a non-drying oil and Quinizarinegreen base.

8. Method of tinting and conditioning yarn containing organicderivatives of cellulose comprising applying thereto a tinting fluidcompris-, ing a solution of a non-drying oil and Quinizarine green base.

9. Yarn tinted with a fugitive tinting fluid comprising a non-drying oiland Quinizarine green base.

TODD B. MEISENHEIMER.

